Key result
Appropriate indications for angiography were associated with a higher rate of obstructive CAD compared to inappropriate indications (52.9% vs 30.9%, P<0.001).
Why the study?
Do the 2012 appropriate use criteria for diagnostic catheterization accurately predict the presence of obstructive CAD and the need for subsequent revascularization in patients with suspected stable ischemic heart disease?
Cohort (n=48,336)
Yes
Do the 2012 appropriate use criteria for diagnostic catheterization accurately predict the presence of obstructive CAD and the need for subsequent revascularization in patients with suspected stable ischemic heart disease?
Absolute Event Rate: 52.9% vs 30.9%
p-value: p=<0.001
Although the 2012 appropriate use criteria for coronary angiography correlate with findings of obstructive CAD and revascularization, a substantial number of patients deemed 'inappropriate' or 'uncertain' still have significant coronary disease, challenging the criteria's clinical utility.
Substantial obstructive CAD in inappropriate cases cautions against rigid application; challenges criteria accuracy and leaves open prospective validation.
BACKGROUND: The use of invasive coronary angiography in stable ischemic heart disease (IHD) varies widely. OBJECTIVE: To validate the 2012 appropriate use criteria for diagnostic catheterization by examining the relationship between the appropriateness of cardiac catheterization in patients with suspected stable IHD and the proportion of patients with obstructive coronary artery disease (CAD) and subsequent revascularization. DESIGN: Population-based, observational, multicenter cohort study. SETTING: The Cardiac Care Network, a registry of all patients having elective angiography at 18 hospitals in Ontario, Canada, between 1 October 2008 and 30 September 2011. PATIENTS: Persons without prior coronary revascularization or myocardial infarction who had angiography for suspected stable CAD. MEASUREMENTS: Appropriateness scores were ascertained by using data collected at the time of the index angiography and were categorized as appropriate, inappropriate, or uncertain. RESULTS: Among the final cohort of 48 336 patients, 58.2% of angiographic studies were classified as appropriate, 10.8% were classified as inappropriate, and 31.0% were classified as uncertain. Overall, 45.5% of patients had obstructive CAD. In patients with appropriate indications for angiography, 52.9% had obstructive CAD, with 40.0% undergoing revascularization. In those with inappropriate indications, 30.9% had obstructive CAD and 18.9% underwent revascularization; in those with uncertain indications, 36.7% had obstructive CAD and 25.9% had revascularization. Although more patients with appropriate indications had obstructive CAD and underwent revascularization (P < 0.001), a substantial proportion of those with inappropriate or uncertain indications had important coronary disease. LIMITATION: Data were not available on whether symptoms were atypical. CONCLUSION: Despite the association between appropriateness category and obstructive CAD, this study raises concerns about the ability of the appropriate use criteria to guide clinical decision making. PRIMARY FUNDING SOURCE: Canadian Institutes of Health Research.
No takes yet. Share an insight, caveat, or question.
Mohareb et al. (2015) conducted a cohort in suspected stable CAD (n=48,336). Appropriate indications for angiography vs. Inappropriate indications was evaluated on obstructive coronary artery disease (CAD) (p=<0.001). Appropriate indications for angiography were associated with a higher rate of obstructive CAD compared to inappropriate indications (52.9% vs 30.9%, P<0.001).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: